Cost of electricity to deposit 108 grams of Aluminium is ‘X’. Cost of electricity to deposit 48 grams of Magnesium would be
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a
X/3
b
X/6
c
X
d
X/2
answer is A.
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Detailed Solution
GEW of Al = 9 g.GEW of Mg = 12 g.108 grams of Al can be deposited by ‘X’. 9 grams of Al can be deposited by ?∴ cost of 1F of electricity = X/12.12 grams of Magnesium can be deposited by X/12.48 grams of Magnesium can be deposited by X/3 .